Hi Lone Soldier
You have defiantly started puberty so the changes you are hoping for will happen how long it takes and what the end result will be is hard to predict.
There is really no way to speed up the process and since you have started puberty there would be no need for it anyway.
Puberty is a process that takes years to go through and everyone grows and develops at different rates and times.
You could simply just be a bit of a late bloomer and that is very common when your body is ready all the changes associated with puberty will happen as you reach the different stages.
If you search for the Tanner puberty scale and do the quiz it will tell you what stage you are at and provide you with information on growth and development.
It sounds like you are developing just as you should be.